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EN ISO 15310:2005

Current
Current

The latest, up-to-date edition.

Fibre-reinforced plastic composites - Determination of the in-plane shear modulus by the plate twist method (ISO 15310:1999)
Published date

27-07-2005

Foreword
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Apparatus
6 Test specimens
7 Number of test specimens
8 Conditioning
9 Procedure
10 Calculation and expression of results
11 Precision
12 Test report
Annex A (informative) Precision data
Bibliography

1.1 This International Standard specifies a method for determining the in-plane shear modulus (G12) of fibrereinforcedplastic composites using a standard plate specimen. When applied to isotropic materials, the shearmodulus measured is independent of direction.1.2 The method is used to determine the shear modulus of the test specimens but not to determine the shearstrength. It applies to a plate supported on two points on one diagonal and loaded on the other diagonal by thesimultaneous movement of two loading points attached to a cross-beam.1.3 The method is suitable for use with fibre-reinforced plastic composites with both thermoset and thermoplasticmatrices.Due to the shear deformation being applied under flexural conditions, for laminated materials with different fibreformats and/or different orientations, the layers of material must be well distributed across the section so that it isapproximately "homogeneous" in the through-thickness direction.The principal material axes, if present, must be orientated normal to the plate edges (see 3.8).NOTE This method can be applied to unreinforced polymers and other materials (e.g. metals, ceramics and metal- orceramic-matrix composites).For material fabricated using unidirectional plies, the shear modulus obtained using a multidirectional specimen(i.e. 0°/90°/_ 45°) is not the same as that obtained for unidirectional or cross-ply (0°/90°) material.1.4 The method is performed using specimens which may be moulded to the chosen dimensions, machined fromtest plates or machined from flat areas of products.1.5 The method specifies preferred dimensions for the specimen. Tests which are carried out on specimens ofother dimensions, or on specimens which are prepared under different conditions, may produce results which arenot comparable. Other factors, such as the speed of testing and the conditioning of the specimens, can influencethe results. Consequently, when comparative data are required, these factors must be carefully controlled andrecorded.NOTE The stress-strain response in shear is very non-linear at higher strain levels. This test method determines themodulus within a low strain region and is not applicable to higher strains.

Committee
CEN/TC 249
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
ISO 1268:1974 Plastics Preparation of glass fibre reinforced, resin bonded, low-pressure laminated plates or panels for test purposes
ISO 2602:1980 Statistical interpretation of test results Estimation of the mean Confidence interval
ISO 291:2008 Plastics Standard atmospheres for conditioning and testing
ISO 5893:2002 Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification
ISO 2818:1994 Plastics — Preparation of test specimens by machining

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